i386: Change mnemonics from VCVTNE2PH2[B,H]F8 to VCVT2PH2[B,H]F8

i386: Change mnemonics from VCVTNE2PH2[B,H]F8 to VCVT2PH2[B,H]F8

gcc/ChangeLog:

	PR target/118270
	* config/i386/avx10_2-512convertintrin.h: Change intrin and
	builtin name according to new mnemonics.
	* config/i386/avx10_2convertintrin.h: Ditto.
	* config/i386/i386-builtin.def (BDESC): Ditto.
	* config/i386/sse.md
	(UNSPEC_VCVT2PH2BF8): Rename from UNSPEC_VCVTNE2PH2BF8.
	(UNSPEC_VCVT2PH2BF8S): Rename from UNSPEC_VCVTNE2PH2BF8S.
	(UNSPEC_VCVT2PH2HF8): Rename from UNSPEC_VCVTNE2PH2HF8.
	(UNSPEC_VCVT2PH2HF8S): Rename from UNSPEC_VCVTNE2PH2HF8S.
	(UNSPEC_CONVERTFP8_PACK): Rename from UNSPEC_NECONVERTFP8_PACK.
	Adjust UNSPEC name.
	(convertfp8_pack): Rename from neconvertfp8_pack. Adjust
	iterator map.
	(vcvt<neconvertfp8_pack><mode><mask_name>): Rename to...
	(vcvt<convertfp8_pack><mode><mask_name>): ...this.

gcc/testsuite/ChangeLog:

	PR target/118270
	* gcc.target/i386/avx10_2-512-convert-1.c: Adjust output
	and intrin call.
	* gcc.target/i386/avx10_2-512-vcvtne2ph2bf8-2.c: Move to...
	* gcc.target/i386/avx10_2-512-vcvt2ph2bf8-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-512-vcvtne2ph2bf8s-2.c: Move to...
	* gcc.target/i386/avx10_2-512-vcvt2ph2bf8s-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-512-vcvtne2ph2hf8-2.c: Move to...
	* gcc.target/i386/avx10_2-512-vcvt2ph2hf8-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-512-vcvtne2ph2hf8s-2.c: Move to...
	* gcc.target/i386/avx10_2-512-vcvt2ph2hf8s-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-convert-1.c: Adjust output
	and intrin call.
	* gcc.target/i386/avx10_2-vcvtne2ph2bf8-2.c: Move to...
	* gcc.target/i386/avx10_2-vcvt2ph2bf8-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-vcvtne2ph2hf8-2.c: Move to...
	* gcc.target/i386/avx10_2-vcvt2ph2bf8s-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-vcvtne2ph2bf8s-2.c: Move to...
	* gcc.target/i386/avx10_2-vcvt2ph2hf8-2.c: ...here.
	Adjust intrin call.
	* gcc.target/i386/avx10_2-vcvtne2ph2hf8s-2.c: Move to...
	* gcc.target/i386/avx10_2-vcvt2ph2hf8s-2.c: ...here.
	Adjust intrin call.